Filter icon on Android

Sorry for bugging you with such a simple question, but I'm wondering what your insights and experiences are in the usage of Android's defined filter icon.

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Based on my personal experience, there's no such thing as a standalone, unambiguous icon that represents a filter (Ideally either incl. a text label or only text).

However, Android seems to use three bars that are supposedly represent a funnel (I guess).

Has anyone encountered problems with the usage of that icon? Is it easy, understandable, and discoverable to customers?

I currently tend to include a text label rather than an icon, but I'm also aware of the fact that this may be a well-known and native pattern defined by the system and therefore useful for customers who're familiar with Android.

What are your thoughts in that regard? Any previous experiences?

Thanks heaps, guys! :-) Highly appreciate your input here.

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